Hat rack



FIG. 1 is a front elevational view of a hat rack, showing my new design;

FIG. 2 is a rear elevational view of a hat rack thereof;

FIG. 3 is a right side elevational view of a hat rack thereof;

FIG. 4 is a left side elevational view of a hat rack thereof;

FIG. 5 is a top plan view of a hat rack thereof; and,

FIG. 6 is a bottom plan view of a hat rack thereof. 

The ornamental design for a hat rack, as shown and described. 